This appears to be part of the governor's "green freight" effort.
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The Southern California Leadership Council believes the solution lies is what they call a “green freight” initiative — a self-reinforcing cycle of investment in trade growth and environmental improvement projects. They believe the way forward is to build support for a coordinated effort in which the public and private sectors will each pay only for those projects from which they derive tangible benefits. The state pays only for projects that make communities more livable, such as eliminating delays at rail crossings or reducing or eliminating diesel pollution along freeways. Meanwhile, the private-sector partners would focus investments on adding capacity and efficiency, and paying for any state-mandated environmental mitigation.
What? With grade seperations at every crossing??? (Gee... I just guess I have no imagination... right?)